\begin{myenv}
	\part{main title}
		part body
	\chapter{\emph{emphasise}title text}
	 body text body text
	\section{section text}
	 section body
	\section{section text}
	 section body
	\subsection{sub title}
		subsection body subsection body
	\subsubsection{subsub section title}
		subsubsubsubsubsubsub
	\chapter{second chapter}
	 chapter body chapter body
	\part{another part}
		more parts!
	\chapter{more chapter! :)}
	 some mathematics:
	 \[
		 x^2
	 \]
	\subsection{and some section}
		to wrap things up
\end{myenv}
